Given | x + 2 | + | Y-3 |, find the value of - 2 and 1 / 2-3 / 5Y + 4xy (X represents the unknown x, not the multiplier)

Given | x + 2 | + | Y-3 |, find the value of - 2 and 1 / 2-3 / 5Y + 4xy (X represents the unknown x, not the multiplier)

Is it | x + 2 | + | Y-3 | = 0?
So x + 2 = Y-3 = 0
x=-2,y=3
Original formula = - 5 / 2 × (- 2) - 5 / 3 × 3 + 4 × (- 2) × 5 / 3
=5-5-10/3
=-10/3

(2X-4) * 0.7 + 4 = 2 * 0.8x (x is an unknown number and "*" is a multiplier sign)

（2x-4)*0.7+4=2*0.8x
1.4x-2.8+4=1.6x
1.4x-1.6x=-1.2
-0.2x=-1.2
x=6

(1)(3x+5)²-（x-9）²=0 （2）3x²-4x-1=0
(1)(3x+5)²-（x-9）²=0
（2）3x²-4x-1=0
(3) Given the equation x & # 178; + (m-1) x + M-10 = 0, one of which is followed by 3, find the value of M and the other of the equation